8
3.8 Power cable connect
Once the equipment has been finally positioned and secured, connect the power cables as
described in the following procedure.
Verify the UPS is totally isolated from its external power source and also all power isolators of the
UPS are open. Check to see if they are electrically isolated, and post any necessary warning signs to
prevent their inadvertent operation .
Remove the cover of terminals for wiring easily.
Terminal sequence from left to right: Input phase A(L1), input phase B(L2), input phase
C(L3), input Neutral line, output phase A(L1), output phase B(L2), output phase C(L3), output
Neutral line, battery positive, battery Neutral, battery negative. There are 3 connectors of
GROUND under the terminal block.
Choose appropriate power cable.
（
Refer to the table above
）
and pay attention to the
diameter of the connection terminal of the cable that should be greater than or equal to that of
the connection poles;
WARNING!
If the load equipment is not ready to accept power on the
arrival of the commissioning engineer then ensure that the system
output cables are safely isolated at their ends
Connect the safety earth and any necessary bonding earth
cables to the copper earth screw located on the floor of the
equipment below the power connections. All cabinets in the UPS
must be grounded properly.
CAUTION!
The earthing and neutral bonding arrangement must be in
accordance with local and national codes of practice.
Summary of Contents for YDC3300
Page 33: ...32...
